DC 12V 24V 36V 48V 10A Power Supply Battery Controller Emergency Automatic Switch Module Features: This controller is used for emergency battery switching; when there is power on main power source terminal, it will connect to main power source as power supply; otherwise, it will automatically switch to battery. When the power on main power source is back, it will switch to main power. Designed with screw terminals for convenient wire connection. Convenient e, it will automatically identify voltage between 12V and 48V DC. Widely used for controlling power supply of incubator, laptop, network. Specifications: Voltage: DC12V~48V Load Current: 10A Size: 5*3*1.8cm/1.9*1.2*0.7in Quantity: 1 Weight: 22g(approx.) Note: 1, Voltages of power source, battery and load should be the same. 2, When it switches, there will be a temporary power failure for about less than 1 second. Package Includes: 1 x Controller